HopStation vs PCSX-Redux

HopStation is a work-in-progress PlayStation emulator written in C++, shared chiefly as a reference for emulator developers rather than as a primary way to play games. It emulates the R3000 CPU, GPU, DMA and interrupt controllers, CDROM, GTE, SPU, MDEC, and memory cards. The project provides a windowed application and a headless command-line mode, with tools including a disassembler, executable sideloading, USB controller input, configurable logging, a VRAM viewer, and ImGui introspection windows. It accepts BIN/CUE disc images, but support is buggy: CUE parsing prevents many games from loading, and inaccurate CDROM emulation also limits compatibility. The SPU lacks features such as volume sweep and dynamic ADSR. A PlayStation BIOS is required; only SCPH1001, the original US launch version, has been tested. HopStation builds for Windows, Linux, and macOS and is free under the MIT License. Some builds need additional shader libraries. The author describes it as an unfinished personal learning project and says feature contributions are unlikely to be accepted.

PCSX-Redux is a free collection of tools, research, hardware design, and libraries for PlayStation 1 development and reverse engineering, centered on a fork of the PCSX emulator. The project aims to replace the plugin system with a monolithic codebase using OpenGL3+ and ImGui. Debugging features include VRAM, MIPS, and SPU debuggers, save states, and a GDB server for controlling program execution from a compatible IDE. Users can also work with a Lua console and editor or connect to Ghidra 10.3 or newer for MIPS debugging and reverse engineering. Graphics options include software and OpenGL GPUs, filtering, true-colour rendering, MSAA, and wireframe or vertex polygon views. It supports Xbox controllers, digital and analog controller emulation, and PlayStation Mouse emulation. OpenBIOS provides a MIPS R3000A BIOS implementation that can boot games without a retail BIOS, although the listed system requirement says a BIOS is required. Downloads are listed for Windows Intel 64-bit, Linux Intel 64-bit AppImage, and macOS Arm. The project describes the codebase as usable but still needing cleanup before a first stable release, with experimental components.